#pragma once

#include <iostream>
#include <string>
#include <unistd.h>
#include <cstring>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include "Log.hpp"

enum
{
  SocketErr = 2,
  BindErr,
  ListenErr,
};

// TODO
const int backlog = 10;

class Sock
{
public:
  Sock()
  {
  }
  ~Sock()
  {
  }

public:
  void Socket()
  {
    sockfd_ = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd_ < 0)
    {
      lg(Fatal, "socker error, %s: %d", strerror(errno), errno);
      exit(SocketErr);
    }
  }
  void Bind(uint16_t port)
  {
    struct sockaddr_in local;
    memset(&local, 0, sizeof(local));
    local.sin_family = AF_INET;
    local.sin_port = htons(port);
    local.sin_addr.s_addr = INADDR_ANY;

    if (bind(sockfd_, (struct sockaddr *)&local, sizeof(local)) < 0)
    {
      lg(Fatal, "bind error, %s: %d", strerror(errno), errno);
      exit(BindErr);
    }
  }
  void Listen()
  {
    if (listen(sockfd_, backlog) < 0)
    {
      lg(Fatal, "listen error, %s: %d", strerror(errno), errno);
      exit(ListenErr);
    }
  }
  int Accept(std::string *clientip, uint16_t *clientport)
  {
    struct sockaddr_in peer;
    socklen_t len = sizeof(peer);
    int newfd = accept(sockfd_, (struct sockaddr *)&peer, &len);
    if (newfd < 0)
    {
      lg(Warning, "accept error, %s: %d", strerror(errno), errno);
      return -1;
    }
    char ipstr[64];
    inet_ntop(AF_INET, &peer.sin_addr, ipstr, sizeof(ipstr));
    *clientip = ipstr;
    *clientport = ntohs(peer.sin_port);

    return newfd;
  }
  bool Connect(const std::string &ip, const uint16_t &port)
  {
    struct sockaddr_in peer;
    memset(&peer, 0, sizeof(peer));
    peer.sin_family = AF_INET;
    peer.sin_port = htons(port);
    inet_pton(AF_INET, ip.c_str(), &(peer.sin_addr));

    int n = connect(sockfd_, (struct sockaddr *)&peer, sizeof(peer));
    if (n == -1)
    {
      std::cerr << "connect to " << ip << ":" << port << " error" << std::endl;
      return false;
    }
    return true;
  }
  void Close()
  {
    close(sockfd_);
  }
  int Fd()
  {
    return sockfd_;
  }

private:
  int sockfd_;
};